I'm not a farmer but I like to garden and I know a few farmers, so this stuff naturally comes up in discussion once in awhile. I was talking about tilling my garden and my buddy launched into an explanation.
He told me that no-till is the way to go, because it preserves the soil's ecosystem. I didn't realize there were several layers of soil and that the compactness and density of them increases erosion, which is not a good thing, of course. I stopped tilling my garden after this conversation.
A soil-structure comparison
Conversation Agriculture infographic part II
“Tilling increases soil erosion, causing more run-off.”